Organic bipolar transistors

Shu-Jen Wang, Michael Sawatzki, Ghader Darbandy, Felix Talnack, Jörn Vahland, Marc Malfois, Alexander Kloes, Stefan Mannsfeld, Hans Kleemann and Karl Leo ()
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Shu-Jen Wang: Technische Universität Dresden
Michael Sawatzki: Technische Universität Dresden
Ghader Darbandy: University of Applied Science
Felix Talnack: Technische Universität Dresden
Jörn Vahland: Technische Universität Dresden
Marc Malfois: ALBA Synchrotron
Alexander Kloes: University of Applied Science
Stefan Mannsfeld: Technische Universität Dresden
Hans Kleemann: Technische Universität Dresden
Karl Leo: Technische Universität Dresden

Nature, 2022, vol. 606, issue 7915, 700-705

Abstract: Abstract Devices made using thin-film semiconductors have attracted much interest recently owing to new application possibilities. Among materials systems suitable for thin-film electronics, organic semiconductors are of particular interest; their low cost, biocompatible carbon-based materials and deposition by simple techniques such as evaporation or printing enable organic semiconductor devices to be used for ubiquitous electronics, such as those used on or in the human body or on clothing and packages1–3. The potential of organic electronics can be leveraged only if the performance of organic transistors is improved markedly. Here we present organic bipolar transistors with outstanding device performance: a previously undescribed vertical architecture and highly crystalline organic rubrene thin films yield devices with high differential amplification (more than 100) and superior high-frequency performance over conventional devices. These bipolar transistors also give insight into the minority carrier diffusion length—a key parameter in organic semiconductors. Our results open the door to new device concepts of high-performance organic electronics with ever faster switching speeds.

Date: 2022
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DOI: 10.1038/s41586-022-04837-4

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